Comment Flagging, Take Two

This branch deals with:

Vistor can flag a comment on a product page as inappropriate. Currently, you don't have to be logged in to do this. Do we want to specify this?

Platform Admin can view all flagged comments and mark as 'active'/'inactive'

Added a few comments with status 'flagged' to the seed data

Added a link to manage flagged comments on platform admin's main page, admin store index

*Views for all but one of these things are created in rough draft.... they could use some styling love. We do not have a view for admin favoriting a comment.

I recreated the work we did on top of current master, so this branch is up to date and should merge in without conflicts. .... long story...